Multiple-flame blowpipe nozzle



Dec. 18, 1928. I 1,696,092

R. J. KEHL- MULTIPLE FLAME BLOWPIPE NOZZLE Filed June 11. 1921 I191,FL'gZ 26 7 M 20 l l 21 I 21 Fig 6,

29 v FL Z 6 251 "\w INVENTORI ATTORNEYS.

Patented 18. 19 28 UNITED. STATES 'PATENT- OFFICE.-

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momma-mu nnowrrrn NOZZLE.

Application "m June 11, i921. Serial are. 476,859.

I This invention relates to blowpipe nozzles I and articularl toimproved multiple flame the flames (produced by such nozzles are luntand rea too far on both sides of the line of we (1, wasting heat andgas. Generally,

the gas enters a' relatively large inlet cavity or passage in the nozzleand is. not uniform 16 ly distributed to the series of outlet passagesleading from such cavity. Furthermore the orifices of nozzles heretoforeused have een permanently open and accord1ngly 1t has usually beennecessary to employ difierent nozzles for different classes of welding.

The principal objects of this invention are toprovide an improved typeofblowpipe nozzle in which the gas suppl ed to the nozzle will be moreuniformlydistributed to the outlet passages which des rably haveportions taperin toward -the or1fices thereof, such orifices ingdesirably variable in their general arrangement as to size, number inuse, location and relativedistance from the weld.

The above and other objectsand the novel features of this invention willbe understood from the following description taken 1n connection withthe accompanying drawings, in which 1 Fig. l is a sectional v1ew of amultiple flame blowpipe nozzle embodying the, present invention, showingthe same coupled to a gas supply device. Figs. 2 and 3 are,respect1vely,,an end elevation and a cross section on the hne 4=4ofFig'.1. D g Fig. 4 is'a central sectional view of another nozzleembodying the present invention,

i Fig. 5 is a cross sectional taken on the line 6- 6: of Fig. 4, Figs.6,7 and 8 are, respectively, a top view; a verticallsectional view onthe hne 8-8 of Fi 6; and a bottom view of a distributing b ock embodyingthis invention,

Figs. 9 and 10 are, respectively, a sectional view and a top viewofanother multiple flame nozzle embodying this invention, and

view of thesame Fig. 11 is a sectional view of another mult ple flamenozzle embodying this invention. A nozzle embodying the presentinvention comprises a body, usually a brass, copper or bronze casting,having a main gas inlet passage constructed .and arranged soas to directand distribute the entering gas to the several entrances of a series orrow of outlet passages leading from the bottom of the. inlet passage.Also the outlet passages may or may not be provided with threadedortions adiacent the orifices thereof where y suitab e tips and plugsmay be interchangeably cou led to the nozzle to permit the variationof te orifice arrangement in accordance with the class of work being welded.

- A The nozzle illustrated in-Fi 1, 2 and- 3 comprisesa body N, usually0 brass or the like, provided at its upper end with suitable.

means whereby the same may becoupled to a gas-supply device such as agas mixer As shown, the nozzle body has an out-. wardly extending flange20 that is adapted to be engaged by a nut 21 having a screwthreaded partinter'fitting I with a similar v screwthreaded art on the gas mixer,Wheres by the upper in ct end of the nozzle may be c mped against and inline with the outlet of'the mixer. The lower end of the nozzle N isreduced as at 22 and'has a series of steps23 on its lower side intowhich the orifices 24 open. The reduced part. 22 also has therein aseries of outlet passages 25 whichtaper to the orifices 24, theentrancesof such ta ering passages being in the bottom of an in ctpassage or cavity Gin the upper part of the nozzle body. The cavity Cmay be formed by drilling parallel and intersect- I ing passages 26,2'Tand 28, as shown in Figs.

1 and 3, such passages being arrangedto uniformly distribute the gas tothe several outlet passages 25. The passages 25 may be. drilled bysuitable tapering tools inserted through the several passages of thecavity C. The flames produced'with a nozzle ofthe type shown in Fig. 1are tapering and may be closely confined to the line of weld, thuseconomically utilizing gas.

Figs. 4 to 11 inclusiveillustrate nozzles employing another type ofdistributing means whereby the entering gas is more umformly distributedto the several outlet leading from the bottom of the main gas inletpassage or cavity 0. Referring to passages Figs. 4 and 5, for example,the upper portion of the nozzle body N may have a cylindrical cavity Cformed therein, the outlet passages 251 leading from the bottom of suchcavity and tapering toward their orifices 241, in the stepped lower sideotthe nozzle. The distributing means in the inlet passage or cavity Cdesirably comprises a substantially cylindrical block B of suitablemetal such as brass or the like, which is suitably held in place, as bymeans of solder 27. Referring also to Fi s. 6, 7 and 8, the distributingblock B has a gas passage therethrough, the upper or inlet portion 28 ofwhich tapers to a oint intermediate the ends of the block, the ower oroutlet portion 29 of the passage then flaring to the lower end of theblock and to the entrances of the outlet passages 251. The passagethrough the distributing block B ma be of any desired shape .but 15desirably elongated, as shown. Otherwise the nozzle shown in Figs. 4 and5, is substantially similar to the one shown in Fig. 1, both havinsubstantially parallel outlet passages Whic will produce flames disposedclose together.

In the nozzles shown in F igs. 9, 10 and 11, the distributing blocks Band B are substantially similar in construction and func tion like theone shown in Figs. 4. to 8, distributing the entering gas to the severaloutlet passages 252 and 253 leading from the bottoms of the cavities inthe nozzle bodies N" and N The nozzle bodies N" and N 3 may have neckportions 30, externally threaded as shown so they may be coupleddirectly to a mating threaded portion of a gas-supply device, the upperpart of the body being provided with a collar 31 having flattenedportions 31 whereby a wrench may be applied to couple and uncouple thenozzle. The orifices 242 and 243 of the nozzles N and N are spaced apartagreater distance than those in from the outlet passages, as for examplethe passage 253 leading from the passage 253, in Fi 11. The outletpassages may be provided with tapering portions as the passages 252 in9, or they may be formed by straight rilling as the passages 253 of Fig.11.

The'lower sides of these nozzle bodies are desirably stepped asillustrated and threaded portions 32 and 33 may be provided adjacent theorifices of the outletpassages whereby suitable tips T, T provided withmating threaded portions may be coupled directly to the nozzle bodies.These tips may be of suitable metal such as copper, brass or the like,and may be provided with passages 34 which taper to the orifices 35thereof, producing a row of flames in the plane of the out-let passagesin the nozzle body and adapted to be closely confined to the line ofweld. Since the tips of a given nozzle are readily interchangeable, thearrangement thereof may be varied as desired to provide a variation ofthe size, location and number of orifices as well as a variation in thedistance of the orifices from the weld Further more, by providingsuitable threaded plugs P as illustrated, the orifices may be closed offas desired. Each nozzle may be provided with one or more sets of tipsand plugs to pro vide a wide range of use for the nozzle.

While the improved blowpipe nozzles have been shown and described indetail, it is to be understood that various changes may be made thereinwithout departing from the spirit of the invention or sacrificing any ofits advantages.

I claim:

1. A multiple flame blowpipe nozzle having an inlet cavity, outletpassages leading from said cavity, and a gas directing means in saidcavity having a central passage therethrough tapering to a pointintermediate its ends and then flaring to the entrances of said outletpassages.

2. A multiple flame blowpipe nozzle comprising a body having meansadjacent the inlet end thereof whereby the same may be secured to agas-supply device, a cavity therein, a series of gas outlet passagesleading from .the bottom of said cavity and having portions thereoftapering toward a corresponding series of orifices in the lower side ofsaid body, and a block in said cavit having an axial gas passagetherethrough t at tapers from adjacent the inlet of the body to a'pointabove the bottom of the cavtiy and then flares to a point adjacent theentrances of said outlet passages in the bottom of the cavity.

3. A multiple flame blowpipe nozzle comprising a body having meanswhereby the same may be coupled to a gas-supply device, a row of outletpassages, an a gas inlet passage tapering to a point intermediate itsends and inn then flaring toward the inlet ends of said out- I letpassages, said outlet passages having portions tapering toward theorifices thereof.

4. A multiple flame blowpipe nozzle comprising a body having meanswhereby the same may be secured to a as-supply device, said body havinga stepp lower side and a series of outlet passages tapering to orificesin the several steps on said lower side, said body also having an inletpassage that tapers a portion of its len h and then flares toward theentrances of said inlet passages.

. 5. A multiple flame blowpipe nozzle comprising a body having meanswhereby the same may be coupled to a gas-supply device, a series ofoutlet passages in said body, tips severally and removabl connected tothe several outlet passages and having tapering passages, and a mainaxial inlet passage that tapers from adjacent the inlet of the nozzleand then flares toward the entrances of said outlet passages.

6. A multiple flame blowpipe nozzle comprising a body having anexteriorly threaded neck adjacent one end whereby the same may becoupled to a gas-supply device, said neck having a gas inlet cavitytherein, a series of steps on the lower side of said body, outletpassages leading from the bottom of said cavity to said series of steps,said cavity having an axial passage therethrough that tapers a portionof its length and then flares toward the entrances of said outletpassages.

In testimony whereof, I afiix my signature.

ROBERT J. KEHL.

